TheSamba.com :: View topic - Are Bosch W10AC plugs too hot for street use?

Fri Jul 05, 2013 12:07 am

Local parts shop had no NGK B5HS plugs so they gave me Bosch W10AC. I checked the heat range chart and they are equal to a NGK 2. Is this too hot a plug to run on the street in a 2054cc with dual 40IDFs? If they are fine to run, would i have to re-jet the carbs to allow for the extra heat?

Fri Jul 05, 2013 3:10 am

I've never seen anyone using those, I wouldn't want to be the guinea pig

just find the right plugs

Fri Jul 05, 2013 5:22 am

stock bug plug is w8ac...that's 2 steps hotter ! don't use them unless you enjoy detonation

Fri Jul 05, 2013 5:35 am

I´d even say that a B5 is too hot for such an engine in such ambient temps. But of course that also depends on tune. Here I only use B5´s in bone stock engines.

T

Fri Jul 05, 2013 6:40 am

Do not use those plugs unless you want pretty holes in your pistons. Also, don't take advice from whoever sold them.

Fri Jul 05, 2013 7:35 am

Replace the plugs and find another repair shop.

They're more interested in selling you what than have in stock than getting the right part.

Fri Jul 05, 2013 4:19 pm

He said parts shop.

Just noticed you're in Wollongong, I'll dig around for an online place I found, they can ship you pretty much any spark plug in a couple of days for less than your local parts shop.

Don't use anything hotter than the W8AC - in your part of the world you can get away with one colder, but any hotter is a real bad idea.

Fri Jul 05, 2013 4:53 pm

Finally got my hands on some NGK B5HS plugs. Not many places stock them over here. Athough i might order a few sets online so i've got spares.